Enhancing the Recyclability of a Vegetable Oil-Based Epoxy Thermoset through Initiator Influence - Université Côte d'Azur Access content directly
Journal Articles ACS Sustainable Chemistry & Engineering Year : 2020

Enhancing the Recyclability of a Vegetable Oil-Based Epoxy Thermoset through Initiator Influence

Thi Nguyet Tran
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Alain Graillot
Alice Mija
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Abstract

Bisphenol A-based epoxy thermosets involve both environmental and health risks. By reacting a vegetal oil-based epoxide with an aromatic diacid containing S−S bonds a thermoset is produced. Herein, reprocessable thermosets were synthesized, the recyclability being designed through a dual mechanism: that of disulfide metathesis and of transesterifications. To assess the feasibility of the reprocessing, a series of 10 initiators was tested to probe their effect not only on the cross-linking reaction but also on the recyclability. This study introduces for the first time the key role of the initiator on the material performance and on their reprocessing. A very good reprocessability was obtained for thermosets prepared using as initiator the imidazole. Moreover, the thermosets exhibit complete chemical recyclability in 1 N NaOH at 80°C, after 3 days, without needing additional chemicals. The reprocessed materials have similar performance with the virgin ones, even after 10 cycles of reprocessing.
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Dates and versions

hal-03007277 , version 1 (27-01-2021)

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Chiara Di Mauro, Thi Nguyet Tran, Alain Graillot, Alice Mija. Enhancing the Recyclability of a Vegetable Oil-Based Epoxy Thermoset through Initiator Influence. ACS Sustainable Chemistry & Engineering, 2020, 8 (20), pp.7690-7700. ⟨10.1021/acssuschemeng.0c01419⟩. ⟨hal-03007277⟩
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